3 out of 4..........kinda like pi.........how it starts at least......3.14.....................


3/4 pi and 7/4 pi are zero......b/c sine + cosine = 0............1/2 the square root of 2....0.71.....two of them......one positive one negative.......7/4 pi = 5.50.....two 5s........equal neg, equal positive........